/*
 * Copyright (C) 2011 Thomas Akehurst
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.github.tomakehurst.wiremock.matching;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.google.common.base.Objects;
import com.google.common.base.Predicate;
import com.google.common.collect.FluentIterable;

import java.lang.reflect.Constructor;

@JsonDeserialize(using = StringValuePatternJsonDeserializer.class)
public abstract class StringValuePattern extends ContentPattern<String> {

    public StringValuePattern(String expectedValue) {
        super(expectedValue);
    }

    @JsonIgnore
    public boolean isPresent() {
        return !nullSafeIsAbsent();
    }

    public Boolean isAbsent() {
        return !nullSafeIsAbsent() ? null : true;
    }

    @JsonIgnore
    public boolean nullSafeIsAbsent() {
        return false;
    }

    @Override
    public String toString() {
        return getName() + " " + getValue();
    }

    public final String getName() {
        Constructor<?> constructor =
            FluentIterable.from(this.getClass().getDeclaredConstructors()).firstMatch(new Predicate<Constructor<?>>() {
            @Override
            public boolean apply(Constructor<?> input) {
                return (input.getParameterAnnotations().length > 0 &&
                        input.getParameterAnnotations()[0].length > 0 &&
                        input.getParameterAnnotations()[0][0] instanceof JsonProperty);
            }
        }).orNull();

        if (constructor == null) {
            throw new IllegalStateException("Constructor must have a first parameter annotatated with JsonProperty(\"<operator name>\")");
        }
        JsonProperty jsonPropertyAnnotation = (JsonProperty) constructor.getParameterAnnotations()[0][0];
        return jsonPropertyAnnotation.value();
    }

    @Override
    public String getExpected() {
        return getValue();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        StringValuePattern that = (StringValuePattern) o;
        return Objects.equal(expectedValue, that.expectedValue);
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(expectedValue);
    }
}
